Grinding device.



K. E. AHLBBRG.

GRINDING DEVICE.

1 APPLIUATIUE FILED IAB. 11I 1911.

1,010,565. Patented 1196.541111.

a anun-11mm' 1.

messe r $7 Y K. Ef AHLBBRG.

GRINDING DEVIUE.

ArrLIoA'rIoN rILBn 111111.11, 1911.

1,010,565. Patented 1160.5,1911

2 SHEETS-SHEET 2.

of rotation of the other.

- KARL E. AHLBEEG. OF CHICAGO, ILLINOIS.

@BINDING DEVICE.

secmcaaon' t Leners raient.

Patented Dee. 5, 1911.

Application filed March 11,'191L Serial No. 613,819. i

1b all wmm it may concern.'

Be it known that'I, Kam; E. Annemie, a citizen of the United States, residing atl East Thirty-ninth street, in the city -of Chicago, countyof Cook, and State o Illinois, have invented new and useful Improvements in Grinding Devices, of which the following is a specification.

This invention relates to improvements in grinding devices and more especially to a rotating grindingdisk or wheel adapted for operation upon a part which also rotates at a. relativelir ditierent speed, the rotating parts being so arranged t iat the plane of rotation of one is movable relatively to the plane As here shown, it includes a rotating grinding disk or wheel so mounted and arranged as to adapt it for movement in a plane other than iits plane, of

rotation, and is here illustrated in connec-` tion with its use for the purpose of giiinding annular grooves in either the inner or outer cylindrical surfaces ot' parts which are at the same time rotating about their axessuch for example as the two ball-rings of the device known in the art'as an annular [mil-bearing.

More particularly the device comprises means for supporting'either one of such ballriugs-and rotating it about. its axis; and means for rotating the grindingr disk at a relatively diti'erentspecd with its grinding edge in contact with the portion ofthe ball ring which is to be ground; said grinding disk being mounted in a manner to permit of its moven'icnt about an axis or chord in the plane of the disk wherein' a point on thc periphery of said disk lying at the en d of a radius which Ainsects such chord lwill describe the arc of a. circle. The mounting of said grinding disk is adapted for hori- Zonta] movement relative to such last luentioned axis, whereby the latter is caused to approach or recede from the center of the dls c' and the radius' of an arc described by a point on the periphery of the disk moving 'about such axis as a center, is correspondingly increased or decreased in length.

[he foregoing arrangement ot parts is Securedl'by providing a flat circular table adapted to rotate ina horizontal plane and mounting the grinding disk above it in such positionthat the vertical axis ot rotation "of said circular table passes through the plane of the disk; and pro-'iding means for shiftv,ing the position ot the disk above the table inward and outward in the vertical plane of one of the radii of the circular table. By this means the two points on the periphery of the disk whose tangents'are vertical lines may, by the rotation of the table, be caused todescrbe eirculararesin horizontal planes above and parallel to the plane of the table. One of these points is shown in Figs. 1 and 3 in engagement with an annular groove inr the periphery of a ball-ring (the latter being the inner4 one of a complete bearing assembly) and the operation is the same when the device. is used to rind an annular groove in the exterior mem er or ball-rino of such a bearing, assembly, in such case the en tire device bein placed, relatively to the ballring, in such 'iosition that the disk may operate within the ring and its periphery may engage with the internal wall of the same.

As here illustrated, the ball-ring which is being operated upon is supported in the chuck of a lathe of well l' own form, and the grinding device, together with its mounting, is placed 'upon the bed of the lathe in a manner similar to the manner in whichthe lathe'tools are cominonbgplaced thereon, being rotated by means of a belt from a lineshaft overhead engaging with a pulley whose shaft is `supported in the tail stock of the lathe, Said pulley connecting with theal )indie of the grinding `disk by means of a exible shaft in order to permit of the movement of the grinding disk about the vertical axis as above described.. The device may however assume other forms without departing from the spirit 4ot' the present invention, as A 'will aipear from the. further description thereo and as pointed out in the appended claims.

The device may be better understood by reference to the accompanying drawings, in which:

` Figure 1 is a view `in side elevation showing a portion of the bed of a lathe with the improved grindin device mounted thereon. Fig. 2 is an axia vertical section `throu h the shaft or Spindle of the rindiug dis t, being taken on the line 2--2 0% Fig. 3. Fi 3 is n top plan view of the grindn dist and its related arts. Fig. 4 is aV View of -the same. parts in end elevation. Fig. 5 is a `vertical Vaxial lsection on a larger scale, taken through one of the clutch members used in connection with the device` Fig. 6 is a similar view, but on arsmaller scale, showing a different; form of clutch member.

los

Fig. 7 is a vertical axial section through the driving spindle of the grinding device.

' As shown in saiddr'awngs 10 indicates the bed portionof a lathe upon which is E mounted a slidin carriage 11, having concealed in its interior a spur pinion enga ing with a horizontal rack 12 and actuated y al 22; upon the upper part of the carriage 11 is mounted a cross-sliding-tool carrier 25, the same being formed with 4a transverse horizontal grooveain its lower surface engaging with a correspondingly shaped tongue 28 upon said carriage, whereby said tool carrier is maintained in position upon the carriage but in amanner permitting of its relative -crosswise motion. A screw 30 with a. handle 3l engages'with a'nut upon said tool carrier for the4 purposeof electing suoli crosswise motiom VIn the upper part of said tool carrier-is formed a circular opening 32 in which is ordinarily placed a rotatable toolcarrying member own as a turret.

All ofthe before mentioned parts consti- 35 tute elements ofa lathe of a general form commonl used for a variety of purposes; and the,1mproved device which constitutes the subject of the present invention' may be Aused in connection with such a lathe as well as in connection with lathes of many other well known forms, the particular construction of the before mentioned parts not constituting any part of the present invention.

40 `indicates a flat horizontal circular table having at its center a depending cylindric hub 4l`which is adapted to engae with the o ening 32 in the tool carrier. t one part ci, the margin of said table is formed a vertical wall, 43 which carries the parts form ing `the bearing for the rotating grinding disk. These comprise a vertical standard 45 having its upper part formed as a horizontal journal box 46, su porting a tube 47 1n which are fitted bus ings 49 and 50. These bushings form bearin for a shaft or spindle 52.v The said 'wa 43 is formed with an integral ton e or raised rtion 55 upon its outer sur ace, said ra portion having its upper and lower faces diagonally 'undev- `tout as indicated by the/figures 57 and 58 to'en with correspondingly sha' portionsgclitge the member 45 -whereby t e latter and the wall memberg43 are 'maintained in enga ement with each other in a manner 65 Lpermitting of therelative horizontal sliding ing it against endwise movement with res placed a sharp-edged grindin motion of the part 45. Upon one of the end faces of the standard 45 is formed a bracket member forming a bearing for a rotatin shaft 61, -the greater ortion of which threaded to engage wi a nut 62 ri idly se- 'l0 .cured to said supporting wall 43gthe adja-` cent surface of t ie part 45 bein semi-cylindrically curved outward in or er to afford a space 63, (Fig. 4) for 4the accommodation of said screw and nut. Relative horizontal motion between the member 45 and the wall 43 ma beetl'cted by rotating said screw 61, a han le, 65 beiner provided upon its end for such purpose, and collars or flanges 66 secur- 80 spect to, the bracket member 60. A thin strip of metal 70 is placed between the engaging faces 58 of the wall member 43 and the standard 45, being maintained thereih by short Vertical pins 71 as indicated. An adjusting screw 72 presses at its inner end against 'such strip for the purpose of springing the same upward and forcing itinto frietional contact with the engaging face of the part 43 for the pui-pose of reventing such relative movement between tEe parts 45 and 43 as might otherwise be due to wear upon the engaging faces 57 and 58. The tube 47 passes through the journal box 46, the latter b'ing longitudinally split at one side and formed with Hanges 75 upon the adjacent margins of the s lit portions which "flanges are engaged by bo ts 76, by the tightening of which the tube 47 may be rigidly clamped within the journal box 46.,"

The bushings 49 and 50 are fittedinto the ends of said tube and a'ord bearings f or said shaft '52. One end of said shaft is reduced in diameter through a portion of its length 78, which reduced portion is threaded for enga ement with an inner a'nd outer iange or col ar 80 and 81 respectively. The collar BOis formed with a flat engaging face on one side for engaging with they end of the bushing 49 in order to prevent inward movement of the shaft 52 and upon its o posite side with ag' short cylindric boss' or ub 83 upon which y disk 85. The outer collar 81 is then screwe upon the threaded portion 78 and forced' ti htly against the face of the grindin disk, w eres by the disk is rigidly secur between the two collars. In order to afford meansfor engagement of a wrench with said collars 80 and 81 they are each flattened upon ortions of .their perilplieries, as indicate -by members and rotatably mounted in bearing members 97 secured in a flexible tube 98, Which entersia short distance into the outer end of the bushing 50; said bushingliaving its interior diameter enlarged for a short distance for the purpose of accommodating the tube 98. The particular construction of said flexible shaft and its incasing tube form no art of the present invention, as other wel known forms of these devices are adapted for use in connection with the other parts of the device here shown.

The table rests upon the tool'carrier 25,

` being placedin position with its hub 41 engaging with the opening 32, and is secured against displacement by means of a flat spring 105, pinned at one end by means of a cap screw 107, to the said tool carrier in a manner ermittinf it to extend over the upper sur ace et said table. ,and having at its other end a short stud or pin 10G which enters a small circular opening 108, in the center of the upper surface of said table.

Referring now to the means for rotating the flexible shaft 95 (Fins. 1 and 7), 120 in` dicates a belt. 'pulley wliich is dri ren by a belt 121 from a line shaft over-head. Said pulley rotates upon a fixed shaft or spindle 1 22 supported in the tail-stock of the lathe, said s indlc being tapered in 'diameter throng i a portion of its length 123 and being thrust into a `correspondiugly shaped opening'iii the tail-stock and remaining therein by its frictional engagement therewith. i screw 125 extends radiallyinto the pulley" and its inner end is rounded and engages with an annular groove in the spindle, whereby the pulley is prevented from slipping otl' its shaft. rl`he outer face of the pulley isformed with a hub 127 to which is fixed an end of the said flexible shaft. An

opening, 128, is irovided through the rear ortion of the tail-stock, through which may 'e thrust a rod for the purpose of reinouing the spindle 122. rl`he means above described lfor supporting the pnlley'120 adapt the device for use in connection with lathes of a,

well known form, the tail-stock heilig commonly f orined as shown for the purpose of supportingi other parts of th'e lat ie therein,

but the p arts may be otherwise arranged;

and the disk may be otherwise rotated than by means of a flexible shaft as here shown.

In Figs. 1, 3 and 5 is shown a clutching device 130, the same comprising a shank or- 'tion 13'1, only a part of the length of w iich is shown, and a short cylindrical portionof intein It is designed that one of the ballv rings 136, (being the inner one of the two' ,lesser diameter 132; the latter bein ma'de tubular, longitudinally slotted, an internally threaded, whereby itina be expanded by a short taper screw 135 w iich is forced com risn an ordinary complete bearing assein ly) s all beplaeed over the cylindrical part 132 as shown and auch cylindrical part is then cx ended by forcing the screw, 135 into it; w iereby the ring is frictionally retained in position. The shank 131 is then engaged. by the chuck 22, in the same manner as would benny similarly shaped bar, for the purpose of rotating the ring.`

In Fig. 6 is shown on a different scale a corresponding elutchin device 140 which is used in connection wit rtlie grindinwof the exterior ball-ring of a bearing asseni ily, said device comprising a shank portion 141, adaptcdto be engaged by the chuck as above described, and a ring-shaped portion or-riin 1.42 within which the ball-ring 143 is placed.

Said ring-shaped portion or rim is radially slotted at two diaineti'ically opposite points 143, 143 in its circumference, its adjacent marginal portions being provided with lugs or projections 140, which are drawn together by means of 'bolts and nuts 147 whereby the rini may be contracted upon the ball-ring 'and both rotated together.

'lhe operation of the device is as follows: 'lhe circular table withits `attached parts is placed in'positioii upon the lathe, and the partt'o be ground is secured to its corresponding Vclutching device, 130 or 140, and the latter enna red b vthe chuck.' The osition ol the 'dist witi respect to the axis of rotation of the'table is'then arranged by adjusting the screw 61, in order to secure the proper distance between such axis and one ot' the tangonts to the disk which is parallel to it, thisl distance being the radius of the groove which will be ground' (Fig. vv3). The parts are then rotated, as above described, and brought into engagementby adjusting the tool earrier25 through the screw 30;

while the table is swung Iback and forth about its axis of rotation. This process is continued, the disk-being kept inengagement with the ball-ring by adjusting the screw 30, to coni icnsate for the material ground away, until tlic desired depth of groove has been eut. A handle 150, attached tothe standard 45, provides a .convenient means for 'swin ing the table as above described.

W iile .the improved grinding device has been described above as including' a lathe among its elements, it is evident that other elements may be substituted without departingfrom the spirit. of the present inventionas for example, the pice of work which is` being ground may be otherwise supported and rotated thanbymcans of a lathe; or, in other kinds of operations, it may not be ''otated at all. Likewise, the parts particularly described'above maybe otherwise operated than as stated-as, for example, the grinding disk may be shifted above its table until Athe axis of tihetable falls outside the` circumference-of the ldisk (instead of inten, secting it as a chord).` Iii-such case, swinging the table would' cause tliecntting edge A ing a rotating' chuck, across-sliding tool carrier, and a'tail-stock, of a grinding del vice comprising a. rotatable table f detahably mounted 4,upon said tool carrierfa grinding disk supported u on said table, a rotating member supporte by said tail-stock, means for transmitting rotation from said member to said grinding disk, and means for varying the position` of said grinding 'disk with respect to theaicis oli'rotationr of said y table.

2. The combinationwith a. lathe comprising a head stock and rotating chuck, a` sliding carriage anda cross-sliding tool carrier having an openingin itsto of a detachable grinding'device comprising a rotative table having 'a hub adaspted to enter said openin a grinding di. supported upon said tale, means for sliding said4 grinding disk inward and outward withrespect to the axis of rotation of said table, and means for rotating saidtable while saidv grinding disk is in rotation *andV operatively engaged 4with the work.

3. The combination with a lathe comprising a head stock' and rotatin '-chuck, a tail stock, a sliding carriage, an across-slidiiigtool carrier having an opening `n its top, of a detachable grinding devicecomprising a rotative table having a hub`adapted to enter said` opening, a grinding disk supported Vu n said table, means for sliding said grin ing disk inward and outward wit respect to the axis of rotation of said table, a rotating m'mber 'supported by said vtail stock, means or transmittin` rotation from said member to said glrin ing. disk, and means for rotating sai table while said grind-in disk is` in rotation and opeigatively .l

' .scribed'my naine he resenee of two' wi 110 engag with the work.

L The combination with a lathe compris-- ing a head stock and rotative chuck, -a sliding carriage anda cross-shding tool carrier with an o ning in its top, of a detachable ding evice comprisin a rotative table aving acylindric ub a1 apted to engage with an opening in evice comprisin a rotative table.

a i. i Vding disk sup- Vported by said tab e,

the position of said disk-along the direction of a radius of said table and also for rotating said table while the grinding disk is in Irot-ation and operatively engaged with the work. p f

5. The vcombination with a lathe comprising a head stock and rotative chuck, ai sliding carriage and a cross-sliding tool carrier its top, of a detachable grinding having a cylindric hub a apted to engage with said openingl; and a grindin disk su portedby saidta le and relative v movab e in the 4direction of a radius thereof, said disk being designed for inward and outward movement with respect to the axis of rotation of said table, and said table being'designcdfor rotation While the grindin disk is in rotation and operatively engage with 4the work. i

6. The combination with a lathe comprising a head stock and rotating chuck, a sliding carriage and a' cross-sliding toolcarrier, of a detachable grinding device comprisin a rotative table adapted td engage with sai cross-sliding `tool carrier, 'and a grinding disk supported upon said table and movable relative thereto. 7. The combination with a lathe comprising a head stock and rotating phuck, a slid- .Ying carriage anda cross-sliding tool carrier, of a detachable grinding device comprising a rotative table-adapted to engage'with 'said cross-sliding tool cari-ier, a grinding disk supported upon said table, and means for sliding said grinding disk inward and outivaid with respect to the axis of rotation of said table.

8. The combination with'a lathe comprising a head stock and rotating chuck, a sliding `c arriaflfe and a cross-sliding tool carrier, of a detaciable grinding device comprisin a rotative table adapted to engage with sai cross-sliding tool carrier, a grindin disk supported upon said table and movab e relative thereto, and means for rotating saidtable while said grindin disk is in rotation and .operatively engage with the. work.l

In witness whereof, I have hereunto sub-v nesses this 9th da arch'19 1l. z t l KARI E. HLBERG. i Witnesses: l

E. RAPHAEL Nonnen, Ei'uin R. Rosnnml.. 

